Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 800.7	$ 718.9
Weighted-average shares:
Basic (in shares)	780.6	798.9
Effect of dilutive securities:
Options, restricted stock units, performance-based restricted stock units and other (in shares)	27.1	35.2
Diluted (in shares)	807.7	834.1
Net income per share:
Basic (in dollars per share)	$ 1.03	$ 0.90
Diluted (in dollars per share)	$ 0.99	$ 0.86